Merging change-inner into puni?

[slotThe]

Hi,

I've written a small package that ports vim's ci and ca functionality to Emacs; quoting from the readme, given a function like

function test() {
  return "semantic| kill";
}

with | indicating the point:

• change-inner " would kill the contents of the string, resulting in

  function test() {
    return "|";
  }
  

• change-inner-outer " would kill the entire string:

  function test() {
    return |;
  }
  

• change-inner { would kill the return-statement:

  function test() {|}
  

• change-inner-outer { would kill the entire block:

  function test() |
  

Originally based on magnars/change-inner.el, the package now uses puni instead of expand-region for selecting the appropriate region of text.
In slotThe/change-inner#1 I was asked why this was not included upstream, and the only answer I could come up with is that puni generally seems to favour very general structural editing functions, and this is rather specific functionality. However, of course I don't actually know, so this issue exists to clarify that :)